Gastric polyps are benign elevated lesions that are confined to the gastric mucosa. Gastric polyps usually occur in the gastric sinus, but a few are also seen in the upper part of the gastric body, cardia and fundus. Pathologically, they are mainly divided into proliferative polyps and adenomatous polyps: 1. Proliferative polyps: this type of polyps account for about 75% to 90% of gastric polyps, which are polyps formed by inflammatory mucosal hyperplasia and are not true tumors. The polyps are small, generally less than 37.5px in diameter, round or olive-shaped, with or without a tip, smooth surface, and may be accompanied by erosion. The epithelium is well differentiated and nuclear schizophrenia is rare. Inflammatory cell infiltration is seen in the lamina propria, and some polyps are accompanied by intestinal metaplasia. A small number of hyperplastic polyps can undergo heterogeneous hyperplasia or adenomatous transformation and produce malignant changes, but their cancer rate is generally not more than 1% to 2%. 2, adenomatous polyps: benign gastric tumors derived from the epithelium of the gastric mucosa, accounting for about 10%-25% of gastric polyps. Generally large, spherical or hemispherical, mostly non-tip, smooth surface, a few flattened, striped or lobulated. Histologically, they are mainly formed by surface epithelium, small concave epithelium and glandular hyperplasia. The epithelial differentiation is immature and nuclear schizophrenia is common, which can be divided into tubular, villous and mixed adenomas, often accompanied by obvious intestinal hyperplasia and heterogeneous hyperplasia. The interstitium of the polyp was loose connective tissue with a small amount of lymphocytic infiltration. There was no obvious hyperplasia in the mucosal muscle layer and no dispersion of muscle fibers. The cancer rate of this type of polyp is high, up to 30%-58.3%, especially the malignant rate of those with tumor diameter greater than 50px, villous adenoma and heterogeneous hyperplasia degree III is higher. Therefore, gastric polyps are generally benign and do not require treatment if they are asymptomatic. Hyperplastic polyps are non-neoplastic polyps, because they are not malignant and can be treated symptomatically by internal medicine with better results. Adenomatous polyps can have a cancer rate of 30% to 58.3%, and should be treated surgically upon diagnosis by biopsy. How to treat gastric polyp? 1.Endoscopic treatment Endoscopic resection is the preferred method of gastric polyp treatment. Endoscopic treatment of polyps is simple, less damaging and less expensive, and most of them are one-time treatment, and a few need to be removed in several times. 2, endoscopic treatment methods (1) high-frequency electrocoagulation method: is currently the most widely used method, its principle is to use the thermal effect of high-frequency current to coagulate the tissue, necrosis and achieve the purpose of removing polyps. (2) microwave cautery method: the use of microwaves can make polar molecules vibrate to produce the principle of thermal effect, and the tissue coagulation and vaporization for polyp cautery, and hemostasis, for polyps less than 50px in diameter without a tip, for smaller polyps can be a one-time cautery, larger ones need multiple treatments. (3) Laser method: The high energy laser generated by the laser is used to irradiate the lesion through the optical fiber introduced by the endoscopic biopsy hole, and the thermal energy transformed by the light energy will cause the coagulation and denaturation of the tissue protein to achieve the treatment purpose. It is mostly used for the treatment of wide-tipped or non-tipped polyps. (4) Nylon wire and rubber band ligation method: By ligating the polyp root, it causes ischemia and necrosis to achieve the treatment purpose. Pathology confirmed that the ligated area was intact after treatment, and only the mucosa and submucosa were restricted to produce local ischemic necrosis. Within 1-4 days after ligation, an acute inflammatory reaction occurs in the local mucosa, and granulation tissue proliferation and necrotic tissue is shed to form a superficial ulcer, which is gradually replaced by scar tissue and healed, so it has the advantage of avoiding the occurrence of perforation. (5) argon ion coagulation: argon gas can be conducted by ionization by tungsten wire electrode generated by high-frequency electrical energy, so that the tissue coagulation effect, in recent years applied to endoscopic treatment, received better results. It is mainly applied to those who have a wide base without a tip and the diameter is less than 37.5px. 3.Surgical treatment The indications for surgery are: (1) non-tipped or broad-based polyps larger than 50px. (2) Progressive enlargement of polyps. (3) Adenomatous polyps with heterogeneous hyperplasia, suspicious carcinoma and carcinoma on pathological examination.